“With a drop in Kv value, the torque produced by the motor increases. More torque means more acceleration, and more lifting power. Conversely, motors with higher Kv value produce less torque.
For motors with higher Kv value, you will have to choose smaller propellers. With smaller propellers, you can achieve higher speeds, but efficiency will be lower.
On the other hand, motors with lower Kv value can handle larger propellers that can lift more weight, use less electrical current, are more stable – but have lower speeds.
If all of this sounds a bit confusing, this is what you will want to remember :
A higher pole count motor will have lower Kv value, can output more power and has less rpm.
More power = larger propellers, more lift, higher acceleration.
A lower pole count motor will have higher Kv value, outputs less power, but has more rpm.
Less power = smaller propellers, less lift and less acceleration, but higher speeds (because the RPM – revolutions per minute – is higher)”
My question is: Why? I know how the motor works, but I can’t understand this information. Why does more poles mean lower Kv? Please, help me.
